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<pre><code class="lang-java"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">TraditionalThreadSynchronized</span> </span>{

    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">main</span><span class="hljs-params">(String args[])</span></span>{
        <span class="hljs-keyword">new</span> TraditionalThreadSynchronized().execute();
    }

    <span class="hljs-function"><span class="hljs-keyword">private</span> <span class="hljs-keyword">void</span> <span class="hljs-title">execute</span><span class="hljs-params">()</span></span>{
        <span class="hljs-keyword">final</span> Outprinter outprinter = <span class="hljs-keyword">new</span> Outprinter();

        <span class="hljs-comment">// &#x6B64;&#x7EBF;&#x7A0B;&#x8F93;&#x51FA; java</span>
        Thread t1 = <span class="hljs-keyword">new</span> Thread(<span class="hljs-keyword">new</span> Runnable() {
            <span class="hljs-meta">@Override</span>
            <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">run</span><span class="hljs-params">()</span> </span>{
                <span class="hljs-keyword">while</span> (<span class="hljs-keyword">true</span>){
                    <span class="hljs-keyword">try</span> {
                        <span class="hljs-comment">// sleep 10 &#x6BEB;&#x79D2;</span>
                        Thread.sleep(<span class="hljs-number">10</span>);
                    } <span class="hljs-keyword">catch</span> (InterruptedException e) {
                        e.printStackTrace();
                    }
                    outprinter.print2(<span class="hljs-string">&quot;java&quot;</span>);
                }
            }
        });
        t1.start();

        <span class="hljs-comment">// &#x6B64;&#x7EBF;&#x7A0B;&#x8F93;&#x51FA; python</span>
        Thread t2 = <span class="hljs-keyword">new</span> Thread(<span class="hljs-keyword">new</span> Runnable() {
            <span class="hljs-meta">@Override</span>
            <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">run</span><span class="hljs-params">()</span> </span>{
                <span class="hljs-keyword">while</span> (<span class="hljs-keyword">true</span>){
                    <span class="hljs-keyword">try</span> {
                        <span class="hljs-comment">// sleep 10 &#x6BEB;&#x79D2;</span>
                        Thread.sleep(<span class="hljs-number">10</span>);
                    } <span class="hljs-keyword">catch</span> (InterruptedException e) {
                        e.printStackTrace();
                    }
                    outprinter.print3(<span class="hljs-string">&quot;python&quot;</span>);
                }
            }
        });
        t2.start();
    }

    <span class="hljs-comment">/**
     * &#x8F93;&#x51FA;&#x6253;&#x5370;&#x529F;&#x80FD;&#x7684;&#x7C7B;
     */</span>
    <span class="hljs-keyword">static</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Outprinter</span></span>{

        <span class="hljs-comment">// &#x672A;&#x52A0;&#x4EFB;&#x4F55;&#x4E92;&#x65A5;&#x64CD;&#x4F5C;</span>
        <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">print</span><span class="hljs-params">(String name)</span></span>{
            <span class="hljs-keyword">int</span> len = name.length();
            <span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i=<span class="hljs-number">0</span>;i&lt;len;i++){
                System.out.print(name.charAt(i));
            }
            <span class="hljs-comment">// &#x6362;&#x884C;</span>
            System.out.println();
        }

        <span class="hljs-comment">// &#x4F7F;&#x7528; synchronized &#x5173;&#x952E;&#x5B57;&#x4FEE;&#x9970;&#x4EE3;&#x7801;&#x5757;</span>
        <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">print2</span><span class="hljs-params">(String name)</span></span>{
            <span class="hljs-keyword">int</span> len = name.length();
            <span class="hljs-keyword">synchronized</span> (<span class="hljs-keyword">this</span>) {
                <span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = <span class="hljs-number">0</span>; i &lt; len; i++) {
                    System.out.print(name.charAt(i));
                }
                <span class="hljs-comment">// &#x6362;&#x884C;</span>
                System.out.println();
            }
        }

        <span class="hljs-comment">// &#x4F7F;&#x7528; synchronized &#x5173;&#x952E;&#x5B57;&#x4FEE;&#x9970;&#x5BF9;&#x8C61;&#x65B9;&#x6CD5;</span>
        <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">synchronized</span> <span class="hljs-keyword">void</span> <span class="hljs-title">print3</span><span class="hljs-params">(String name)</span></span>{
            <span class="hljs-keyword">int</span> len = name.length();
            <span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i=<span class="hljs-number">0</span>;i&lt;len;i++){
                System.out.print(name.charAt(i));
            }
            <span class="hljs-comment">// &#x6362;&#x884C;</span>
            System.out.println();
        }

        <span class="hljs-comment">// &#x4F7F;&#x7528; synchronized &#x5173;&#x952E;&#x5B57;&#x4FEE;&#x9970;&#x9759;&#x6001;&#x65B9;&#x6CD5;</span>
        <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">synchronized</span> <span class="hljs-keyword">void</span> <span class="hljs-title">print4</span><span class="hljs-params">(String name)</span></span>{
            <span class="hljs-keyword">int</span> len = name.length();
            <span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i=<span class="hljs-number">0</span>;i&lt;len;i++){
                System.out.print(name.charAt(i));
            }
            <span class="hljs-comment">// &#x6362;&#x884C;</span>
            System.out.println();
        }

        <span class="hljs-comment">// &#x4F7F;&#x7528; synchronized &#x5173;&#x952E;&#x5B57;&#x4FEE;&#x9970;&#x4EE3;&#x7801;&#x5757;</span>
        <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">synchronized</span> <span class="hljs-keyword">void</span> <span class="hljs-title">print5</span><span class="hljs-params">(String name)</span></span>{
            <span class="hljs-keyword">int</span> len = name.length();
            <span class="hljs-keyword">synchronized</span> (Outprinter.class) {
                <span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = <span class="hljs-number">0</span>; i &lt; len; i++) {
                    System.out.print(name.charAt(i));
                }
                <span class="hljs-comment">// &#x6362;&#x884C;</span>
                System.out.println();
            }
        }

    }
}
</code></pre>
<ol>
<li>&#x5982;&#x679C;&#x4E24;&#x4E2A;&#x7EBF;&#x7A0B;&#x5747;&#x6267;&#x884C; <code>print</code> &#x65B9;&#x6CD5;&#xFF0C;&#x90A3;&#x4E48;&#x63A7;&#x5236;&#x53F0;&#x8F93;&#x51FA;&#x7684;&#x7ED3;&#x679C;&#x5C06;&#x662F;&#x5982;&#x4E0B;&#x5185;&#x5BB9;&#xFF08;&#x6CE8;&#x610F;&#x6B64;&#x7ED3;&#x679C;&#x6BCF;&#x6B21;&#x8F93;&#x51FA;&#x5747;&#x4E0D;&#x4E00;&#x6837;&#xFF09;&#xFF1A;</li>
</ol>
<p><img src="images/syn_01.png" alt="syn_01"></p>
<p>&#x7531;&#x6B64;&#x56FE;&#x53EF;&#x77E5;&#xFF0C;<code>java</code> &#x4E0E; <code>python</code> &#x7684;&#x8F93;&#x51FA;&#x660E;&#x663E;&#x662F;&#x6DF7;&#x4E71;&#x4E86;&#xFF0C;&#x6CA1;&#x6709;&#x8FBE;&#x5230;&#x4E92;&#x4E0D;&#x5F71;&#x54CD;&#x7684;&#x8981;&#x6C42;&#xFF0C;&#x5373;&#x4E24;&#x4E2A;&#x7EBF;&#x7A0B;&#x4E0D;&#x4E92;&#x65A5;&#x3002;   </p>
<ol>
<li>&#x5982;&#x679C;&#x4E24;&#x4E2A;&#x7EBF;&#x7A0B;&#x5747;&#x6267;&#x884C; <code>print2</code> &#x65B9;&#x6CD5;&#xFF0C;&#x5219;&#x4E0D;&#x4F1A;&#x51FA;&#x73B0;&#x6DF7;&#x4E71;&#x7684;&#x60C5;&#x51B5;&#xFF0C;&#x53EF;&#x4EE5;&#x8FBE;&#x5230;&#x4E92;&#x65A5;&#x7684;&#x6548;&#x679C;&#x3002;<code>synchronized</code> &#x5173;&#x952E;&#x5B57;&#x4FDD;&#x8BC1;&#x4E86;&#x7EBF;&#x7A0B;&#x4E4B;&#x95F4;&#x7684;&#x4E92;&#x65A5;&#x64CD;&#x4F5C;&#x3002;<code>synchronized</code> &#x8981;&#x5B9E;&#x73B0;&#x6392;&#x4ED6;&#x6027;&#xFF0C;&#x5FC5;&#x987B;&#x6301;&#x6709;&#x4E00;&#x628A;&#x9501;&#xFF0C;&#x5373;&#x5F53;&#x6709;&#x4E00;&#x4E2A;&#x7EBF;&#x7A0B;&#x83B7;&#x53D6;&#x8FD9;&#x628A;&#x9501;&#x4E4B;&#x540E;&#xFF0C;&#x5176;&#x4ED6;&#x7EBF;&#x7A0B;&#x5747;&#x62FF;&#x4E0D;&#x5230;&#x8FD9;&#x628A;&#x9501;&#xFF0C;&#x90A3;&#x8FB9;&#x5176;&#x4ED6;&#x7EBF;&#x7A0B;&#x53EA;&#x80FD;&#x7B49;&#x5F85;&#xFF0C;&#x76F4;&#x5230;&#x62FF;&#x5230;&#x9501;&#x4E4B;&#x540E;&#x624D;&#x80FD;&#x6267;&#x884C;&#x4EE3;&#x7801;&#x5757;&#x91CC;&#x9762;&#x7684;&#x4EE3;&#x7801;&#x3002;&#x6B64;&#x5904;&#x662F; <code>synchronized(this)</code>&#xFF0C;&#x8868;&#x793A;&#x4F7F;&#x7528;&#x7684;&#x9501;&#x662F; <code>Outprinter</code> &#x7684;&#x5B9E;&#x4F8B;&#x5BF9;&#x8C61;&#xFF0C;&#x4E24;&#x4E2A;&#x7EBF;&#x7A0B;&#x6267;&#x884C;&#x8F93;&#x51FA;&#x65F6;&#xFF0C;&#x4F7F;&#x7528;&#x7684;&#x662F;&#x540C;&#x4E00;&#x4E2A;&#x5BF9;&#x8C61;&#xFF0C;&#x6240;&#x4EE5;&#x5B8C;&#x5168;&#x53EF;&#x4EE5;&#x5B9E;&#x73B0;&#x6392;&#x4ED6;&#x6027;&#x3002;<br>&#x5982;&#x679C;&#x4E24;&#x4E2A;&#x7EBF;&#x7A0B;&#x5747;&#x4F7F;&#x7528; <code>print3</code>&#x3001;<code>print4</code>&#x3001;<code>print5</code> &#x5747;&#x80FD;&#x8FBE;&#x5230;&#x4E92;&#x65A5;&#x7684;&#x6548;&#x679C;&#x3002;  </li>
<li>&#x5982;&#x679C;&#x4E00;&#x4E2A;&#x7EBF;&#x7A0B;&#x4F7F;&#x7528; <code>print2</code> &#x4E00;&#x4E2A;&#x7EBF;&#x7A0B;&#x4F7F;&#x7528; <code>print3</code> &#x4E5F;&#x53EF;&#x4EE5;&#x8FBE;&#x5230;&#x4E92;&#x65A5;&#x7684;&#x6548;&#x679C;&#xFF0C;&#x56E0;&#x4E3A; <code>synchronized</code> &#x4F5C;&#x7528;&#x5230;&#x5B9E;&#x4F8B;&#x65B9;&#x6CD5;&#x4E0A;&#x65F6;&#x4F7F;&#x7528;&#x7684;&#x9501;&#x5C31;&#x662F;&#x8BE5;&#x5BF9;&#x8C61;&#xFF0C;&#x6240;&#x4EE5;&#x53EF;&#x4EE5;&#x8FBE;&#x5230;&#x4E92;&#x65A5;&#x3002;  </li>
<li>&#x5982;&#x679C;&#x4E00;&#x4E2A;&#x7EBF;&#x7A0B;&#x4F7F;&#x7528; <code>print3</code> &#x4E00;&#x4E2A;&#x7EBF;&#x7A0B;&#x4F7F;&#x7528; <code>print4</code> &#x5219;&#x8FBE;&#x4E0D;&#x5230;&#x4E92;&#x65A5;&#x7684;&#x6548;&#x679C;&#x3002;<code>synchronized</code> &#x5173;&#x952E;&#x5B57;&#x4F5C;&#x7528;&#x5230;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#x4E0A;&#x65F6;&#xFF0C;&#x4F7F;&#x7528;&#x7684;&#x662F;&#x7C7B;&#x5BF9;&#x8C61;&#xFF0C;&#x800C;&#x4E0D;&#x662F;&#x5B9E;&#x4F8B;&#x5BF9;&#x8C61;&#xFF0C;&#x4E24;&#x8005;&#x4F7F;&#x7528;&#x7684;&#x4E0D;&#x662F;&#x540C;&#x4E00;&#x628A;&#x9501;&#xFF0C;&#x6240;&#x4EE5;&#x8FBE;&#x4E0D;&#x5230;&#x4E92;&#x65A5;&#x7684;&#x6548;&#x679C;&#x3002;<code>print4</code> &#x548C; <code>print5</code> &#x5219;&#x53EF;&#x4EE5;&#x4E92;&#x65A5;&#xFF0C;&#x4E8C;&#x8005;&#x4F7F;&#x7528;&#x7684;&#x662F;&#x540C;&#x4E00;&#x628A;&#x9501;&#x3002;</li>
</ol>
<p><strong>&#x603B;&#x7ED3;&#xFF1A;</strong> 
&#x5982;&#x679C; <code>synchronized</code> &#x5173;&#x952E;&#x5B57;&#x4F5C;&#x7528;&#x5230;&#x5B9E;&#x4F8B;&#x65B9;&#x6CD5;&#x65F6;&#xFF0C;&#x4F7F;&#x7528;&#x7684;&#x9501;&#x662F;&#x8BE5;&#x5B9E;&#x4F8B;&#x5BF9;&#x8C61;&#xFF1B;&#x5982;&#x679C;&#x662F;&#x9759;&#x6001;&#x65B9;&#x6CD5;&#xFF0C;&#x4F7F;&#x7528;&#x7684;&#x9501;&#x5BF9;&#x8C61;&#x662F;&#x7C7B;&#x5BF9;&#x8C61;&#x3002;</p>
<p>&#x5982;&#x679C; <code>synchronized</code> &#x5173;&#x952E;&#x5B57;&#x4F5C;&#x7528;&#x5230;&#x4EE3;&#x7801;&#x5757;&#x65F6;&#xFF0C;&#x5173;&#x952E;&#x770B;&#x62EC;&#x53F7;&#x91CC;&#x9762;&#x7684;&#x9501;&#x662F;&#x4EC0;&#x4E48;&#xFF0C;&#x53EA;&#x8981;&#x662F;&#x591A;&#x4E2A;&#x7EBF;&#x7A0B;&#x4F7F;&#x7528;&#x7684;&#x662F;&#x540C;&#x4E00;&#x628A;&#x9501;&#xFF0C;&#x90A3;&#x4E48;&#x5C31;&#x53EF;&#x4EE5;&#x8FBE;&#x5230;&#x4E92;&#x65A5;&#x7684;&#x6548;&#x679C;&#x3002;</p>
<p>&#x5C3D;&#x91CF;&#x4F7F;&#x7528; <code>synchronized</code> &#x4FEE;&#x9970;&#x4EE3;&#x7801;&#x5757;&#xFF0C;&#x4E92;&#x65A5;&#x66F4;&#x5C11;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x80FD;&#x8FBE;&#x5230;&#x66F4;&#x9AD8;&#x7684;&#x5E76;&#x53D1;&#x6027;&#x3002;</p>

                                
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